I felt bad deleting people, however, since we have no way of knowing who is doing it and most of us can't sit around waiting for a tile to complete. What other option is there?
Hopefully your friends will understand and once this bug is fixed will accept you back. Plus - think of it this way - that's one less person you have to worry about.
Have you guys tried PMing the people who deleted you and you didn't want to be removed? I'm sure a PM and a pact between you guys to NOT TOUCH THAT TILE lol will result in a happy neighborly friendship once again.